Roman Numerals Converter

Convert Roman numerals to numbers or numbers to Roman numerals — type either one.

Works in both directions — enter digits or numerals.
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Roman numeralMMXXVIfor 2,026
RomanMMXXVI
Decimal2,026

Read as

SymbolValue
M1,000
M1,000
X10
X10
V5
I1

How Roman numerals work

Seven letters carry all the values:

I = 1, V = 5, X = 10, L = 50, C = 100, D = 500, M = 1000

Symbols are written largest first and added together, so MMXXVI is 1000 + 1000 + 10 + 10 + 5 + 1 = 2026.

Subtractive pairs

To avoid four identical symbols in a row, a smaller value placed before a larger one is subtracted:

  • IV = 4, IX = 9
  • XL = 40, XC = 90
  • CD = 400, CM = 900

Only those six pairs are valid, and only one of each may appear. That is why standard Roman numerals stop at 3999 — there is no symbol for 5000 to build on.